This is the #1 tire choice for Tour Divide, the longest mountain bike race in the world stretching from Canada to Mexico along the Rockies. It features an elevated centerline that rolls effortlessly on hard surfaces, numerous micro knob working edges providing lateral traction and predictability, and a voluminous casing designed to go the distance. FEATURES: Long-lasting tire with a rounded profile and low rolling resistance SG2 bead-to-bead puncture protection provides improved air retention, and offers 80% more sidewall protection vs traditional single-ply tires TCS Light Fast-Rolling: Lightweight casing with TCS aramid bead and Dual Compound DNA rubber (60a center/50a sides) SPECS: Labeled Size: 700 x 40 Color: Black ISO Width (mm): 40 Flat Protection: Tread and Sidewall ISO Diameter: 622 / Road / 29" Tire Intended Use: Gravel Tire Type: Tubeless Ready Clincher TPI: 120 Tire Bead: Folding Tire Diameter: 700c